At Tue, 6 Jul 2010 10:01:10 -0400 CentOS mailing list <centos@xxxxxxxxxx> wrote:
>
> Jerry McAllister wrote:
> > On Tue, Jul 06, 2010 at 06:41:06PM +0800, Tang Jianwei wrote:
> >
> >> I tried to create some swap files in /dev directory for my desktop.
> >> the dd and mkswap were ok. but when I try to swapon it, i get this:
> >>
> >> # swapon /dev/myswap
> >> swapon: /dev/myswap: Invalid argument
> >>
> >> but when I mv the file to some other directory like /mnt or /, the
> >> swapon works.
> >>
> >> could sb. tell me why?
>
> Well, /dev is *not* a good place for anything but device files.
> >
> > /dev is not a real directory for data files.
> <snip>
> Um, er, what do you mean about it not being a "real" directory?
It is not 'persistent' across boots. It is not backed by actual hard
disk space. Any *data* files (including swap files) will be gone at the
next reboot. The *device* files are re-created by udevd during the boot
process (and later on by the hotplug / HAL subsystem).
>
> mark
>
> --
> When I hear about object oriented systems, I think of one that's been
> around for about 40 years: *Nix. Everything's a file, er, "object", and
> you pipe, er, message from one object to another....
>
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>
--
Robert Heller -- 978-544-6933
Deepwoods Software -- Download the Model Railroad System
http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows
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